<template>
  <div class="cropper-content">
    <div class="cropper-box">
      <div class="cropper">
        <vue-cropper ref="cropper" :img="option.img" :outputSize="option.outputSize" :outputType="option.outputType"
          :info="option.info" :canScale="option.canScale" :autoCrop="option.autoCrop"
          :autoCropWidth="option.autoCropWidth" :autoCropHeight="option.autoCropHeight" :fixed="option.fixed"
          :fixedNumber="option.fixedNumber" :full="option.full" :fixedBox="option.fixedBox" :canMove="option.canMove"
          :canMoveBox="option.canMoveBox" :original="option.original" :centerBox="option.centerBox"
          :height="option.height" :infoTrue="option.infoTrue" :maxImgSize="option.maxImgSize" :enlarge="option.enlarge"
          :mode="option.mode" @realTime="realTime" @imgLoad="imgLoad"></vue-cropper>
      </div>

      <!--底部操作工具按钮-->
      <div style="color:red;margin:15px 0;">图片类型要求：jpeg、jpg、png、jfif</div>
      <div class="footer-btn">

        <div class="scope-btn">
          <label class="btn" for="uploads">选择图片</label>
          <input type="file" id="uploads" :value='upload_input' style="position:absolute; clip:rect(0 0 0 0);"
            accept="image/png, image/jpeg, image/gif, image/jpg" @change="selectImg($event)" />
          <el-button size="mini" type="danger" plain icon="el-icon-zoom-in" @click="changeScale(1)">放大</el-button>
          <el-button size="mini" type="danger" plain icon="el-icon-zoom-out" @click="changeScale(-1)">缩小</el-button>
          <el-button size="mini" type="danger" plain @click="rotateLeft">↺ 左旋转</el-button>
          <el-button size="mini" type="danger" plain @click="rotateRight">↻ 右旋转</el-button>
        </div>
        <div class="upload-btn">
          <el-button size="mini" type="success" @click="uploadImg('blob')">
            确认上传
            <i class="el-icon-upload"></i>
          </el-button>
        </div>
      </div>
    </div>
    <!--预览效果图-->
    <div class="show-preview" style="flex-direction: column;justify-content: flex-start;align-items: center;">
      <div style="width: 100%;margin-left: 2vw;">
        <el-form :inline="true" :model="dataForm">
          <el-form-item label="选择分辨率">
            <el-select v-model="dataForm.name" placeholder="请选择" @change="FBChange">
              <el-option v-for="item in options" :key="item.dictValue" :label="item.dictValue"
                :value="item.dictValue"></el-option>
            </el-select>
          </el-form-item>
        </el-form>
      </div>
      <div :style="previews.div" class="preview">
        <img :src="previews.url" :style="previews.img" />
      </div>
    </div>
  </div>
</template>

<script>
import { VueCropper } from 'vue-cropper'
// import {$URL} from '../api/personalCenter'
import axios from 'axios'
export default {
  name: 'CropperImage',
  components: {
    VueCropper,
  },
  props: ['Name', 'width', 'height'],
  data() {
    return {
      name: this.Name,
      previews: {},
      fileName: '',
      upload_input: '',
      dataForm: {
        name: ''
      },//数值
      options: [],//选择分辨率
      option: {
        img: '', //裁剪图片的地址
        outputSize: 1, //裁剪生成图片的质量(可选0.1 - 1)
        outputType: 'png', //裁剪生成图片的格式（jpeg || png || webp）
        info: true, //图片大小信息
        canScale: true, //图片是否允许滚轮缩放
        autoCrop: true, //是否默认生成截图框
        autoCropWidth: 1920, //默认生成截图框宽度
        autoCropHeight: 1080, //默认生成截图框高度
        fixed: false, //是否开启截图框宽高固定比例
        fixedNumber: [1.74, 1], //截图框的宽高比例
        full: false, //false按原比例裁切图片，不失真
        fixedBox: true, //固定截图框大小，不允许改变
        canMove: false, //上传图片是否可以移动
        canMoveBox: true, //截图框能否拖动
        original: true, //上传图片按照原始比例渲染
        centerBox: false, //截图框是否被限制在图片里面
        height: true, //是否按照设备的dpr 输出等比例图片
        infoTrue: false, //true为展示真实输出图片宽高，false展示看到的截图框宽高
        maxImgSize: 3000, //限制图片最大宽度和高度
        enlarge: 1, //图片根据截图框输出比例倍数
        mode: '303px 174px', //图片默认渲染方式
      },
    }
  },
  created() {
    this.getOption()
  },
  methods: {
    getOption() {
      this.$http('/sys/dict/data/page?dictTypeId=1').then(res => {
        this.options = res.data.data.list
      })
    },
    FBChange() {
      const name = this.dataForm.name.split('*')
      this.option.autoCropWidth = name[0] / 10
      this.option.autoCropHeight = name[1] / 10
      // this.imgLoad(msg)
    },
    init(url) {
      if (url) {
        this.option.img = '/uploads' + url
        this.fileName = url.split('/')[url.split('/').length - 1]
      } else {
        this.option.img = ''
        this.fileName = ''
      }
    },
    //初始化函数
    imgLoad(msg) {
      this.option.autoCropWidth = this.width
      this.option.autoCropHeight = this.height
      this.option.fixedNumber = [this.width / this.height, 1]
      this.option.mode = `${this.width}px ${this.height}px`
    },
    //图片缩放
    changeScale(num) {
      num = num || 1
      this.$refs.cropper.changeScale(num)
    },
    //向左旋转
    rotateLeft() {
      this.$refs.cropper.rotateLeft()
    },
    //向右旋转
    rotateRight() {
      this.$refs.cropper.rotateRight()
    },
    //实时预览函数
    realTime(data) {
      this.previews = data
    },
    //选择图片
    selectImg(e) {
      this.upload_input = ''
      let file = e.target.files[0]
      this.fileName = file.name
      if (!/\.(jpg|jpeg|png|JPG|PNG|jfif)$/.test(e.target.value)) {
        this.$message({
          message: '图片类型要求：jpeg、jpg、png、jfif',
          type: 'error',
        })
        return false
      } else if (file.size / 1024 / 1024 > 20) {
        this.$message({
          message: '上传图片大小不得超过20MB',
          type: 'error',
        })
        return false
      }
      //转化为blob
      let reader = new FileReader()
      reader.onload = (e) => {
        let data
        if (typeof e.target.result === 'object') {
          data = window.URL.createObjectURL(new Blob([e.target.result]))
        } else {
          data = e.target.result
        }
        this.option.img = data
      }
      //转化为base64
      reader.readAsDataURL(file)
    },
    //上传图片
    uploadImg(type) {
      let _this = this
      if (type === 'blob') {
        //获取截图的blob数据
        this.$refs.cropper.getCropBlob(async (data) => {
          let formData = new FormData()
          formData.append('file', data, _this.fileName)
          // //调用axios上传
          this.$http.post('/psc/systemshow/Uploader', formData).then(({ data }) => {
            if (data.code == 0) {
              _this.$emit('uploadImgSuccess', data.imguri)
            } else {
              _this.$message.error(data.msg)
            }

          }).catch()
          // let { data: res } = await _this.$http.post(
          //   '/api/file/imgUpload',
          //   formData
          // )
          // if (res.code === 200) {
          //   _this.$message({
          //     message: res.msg,
          //     type: 'success',
          //   })
          //   let data = res.data.replace('[', '').replace(']', '').split(',')
          //   let imgInfo = {
          //     name: _this.Name,
          //     url: data[0],
          //   }
          //   _this.$emit('uploadImgSuccess', imgInfo)
          // } else {
          //   _this.$message({
          //     message: '文件服务异常，请联系管理员！',
          //     type: 'error',
          //   })
          // }
        })
      }
    },
  },
}
</script>

<style scoped>
.cropper-content {
  display: flex;
  display: -webkit-flex;
  justify-content: flex-end;
}

.cropper-content .cropper-box {
  flex: 1;
  width: 100%;
}

.cropper-content .cropper-box .cropper {
  width: auto;
  height: 300px;
}

.cropper-content .show-preview {
  flex: 1;
  -webkit-flex: 1;
  display: flex;
  display: -webkit-flex;
  justify-content: center;
}

.cropper-content .show-preview .preview {
  overflow: hidden;
  border: 1px solid #67c23a;
  background: #fff;
}

.footer-btn {
  /* margin-top: 30px; */
  display: flex;
  display: -webkit-flex;
  justify-content: flex-end;
}

.footer-btn .scope-btn {
  display: flex;
  display: -webkit-flex;
  justify-content: space-between;
  padding-right: 10px;
}

.footer-btn .upload-btn {
  flex: 1;
  -webkit-flex: 1;
  display: flex;
  display: -webkit-flex;
  justify-content: center;
}

.footer-btn .btn {
  outline: none;
  display: inline-block;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  -webkit-appearance: none;
  text-align: center;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  outline: 0;
  -webkit-transition: 0.1s;
  transition: 0.1s;
  font-weight: 500;
  padding: 8px 15px;
  font-size: 12px;
  border-radius: 3px;
  color: #fff;
  background-color: #409eff;
  border-color: #409eff;
  margin-right: 10px;
}
</style>

